UPDATE - U.S. extends date for fish passage excavation at Hanson Dam

The Corps of Engineers has extended the deadline for bids for final excavation and tunneling for a fish passage facility at Howard Hanson Dam, on the Green River in western Washington. Proposals now are due Nov. 9.

The facility is being built adjacent to an existing outlet tower and 900-foot-long outlet tunnel at the 230-foot-tall rockfill dam. So far, excavation has progressed from an elevation of 1,150 feet to 1,074 feet. The front section of the facility already has been constructed, and is being used as a cofferdam to keep the excavation separated from the reservoir.

The new work will include excavation to final facility design depth and excavating and constructing an attraction water conduit and a personnel access tunnel. The Corps estimates the cost of the work will be between $5 million and $10 million.

Proposals are due Nov. 9 to the Seattle District, Corps of Engineers, P.O. Box 3755, Attn.: CENWS-CT-CB, Seattle, WA 98124-3755. Solicitation No. W912DW-07-R-0045 and related documents can be found on the Internet site www.fedbizopps.gov by entering the number, without hyphens, in the �Quick Search� box.